Typewriting machine



Patented Sept, 9, 1924.

UNITED STATES PATENT ori-icleriil A ALFREDGQF. KUnOwsKI, or BROOKLYN, NEW YORK, AssIGNOR To UNDERWoon rrnwnir'na COMPANY, or New Yon-K, N. Y., 'a CORPORATION OIF DELAwami.l`

TYPEWRITING IVLA'CHINE.

Application led November 11,1919. Serial No, 337,118.

To @ZZ whom t may concern.'

Be it knOwn that I, ALFRED G. F. KU- nowsni, a citizen of the United States, formerly a citizen of Germany, residing in Brooklvn Borough, in the county of Kings, city anud State of New York, have invented certain -new and useful Improvements in Typewriting Machines, of which the following is a specification.; y

rllhis invention relates to typewriter-keys,

and an object thereof is to improve the keyt-Ouch.

To this end, a feature of the invention consists in providing a construction of key, whereby there is relative movement between the key-top and the key-lever. Thisl relative movement is normally resiliently resisted, or cushioned, preferably by a spring, inter'- posed between the key-top and the key-lever. Preferably, also, a socket is provided having a housing for the spring, the key-top being mounted on, or connected to, the socket in any desired manner.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is an elevational view of a portion of a key-lever, showing parts of my iniproveme-nt in section.

Figure 2 is a viewl showing the several parts making up my improved key, separated from each other, so as to set forth clearly the detailed construction of each part; and

Figure 3 is a sectional view.

Referring to the drawings, 1 indicates a key-lever, having a cut-out portion 2 and a slot 3. Over said key-lever fits a socket 4. which has a semi-circular drawn-out portion 5, which acts as a housing for a compression-spring 6. The housing is provided with parallel portions 7, at its lower end, which snugly but slidably embrace the key-lever l, and connected to, or mounted on. the upper enlarged portion of the housing which forms a key-cup, is a key-cap 8, which holds in the key-cup the usual S) and key-paper 10. In Order to secure the key-cap to the housing, said cap may be provided with fio,- gers 11, which may be bent under the housing', as shown in Figures 1 and 3. When the parts are assembled, the compression-spring seats against the lower end 12 of the cutout portion 2 in the key-lever 1, its upper end bearing against a plug 13, in the socket,

beneath the key-paper 10, so'that the spring 6 acts between the key-lever 1 and the keycap 8 to lift theentire key-top. Thus, the tendency of the spring is-to hold' the socket in the elevated position shown in; Figures l and 3, the vertical movement ofthe socket, in obedience. to the action of the spring, being limited by a` pin 14;,.passing through Openings 15 in the parallel portions 'r' of .the .socketvv and through the slot 3 inthe keylever. The slot 3, of course, also limits the downward movement of the socket relativev to the key-lever. By unbending the prongs on fingers 11, the cap 8, glass disk 9, keypaper l0, plug 13 and lthrust-spring 6 may all be removed from the socket t, as shown in Figure l, thereby enabling the spring 6 to be replaced by a new spring, should that become necessary.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

l. In a typewriting machine, the combination with a key-lever having a recess extending downward from the upper edge thereof to serve as a chamber for a spring, of a 'sleeve fitted over the key-lever for sliding movement up and. down thereon, a

character plate or disk supported by and closing the upper' end of the sleeve, a spring seated in the recess in the key-lever within the sleeve and bearing at its upper end against the character plate, and means for holding the character plate against upward displacement, by the spring, relative to the sleeve.

2. In a typewriter key, the combination with a key-leverq of a key-top comprising a socket,- adapted to tit on said key-lever and a cap on said socket, and a spring within the socketacting between the key-lever and cap for providing resiliently-resistcd movement between said key-top and key-lever for cushioningV the key-stroke, said cap being removable to allow removal of said spring from said socket.

3. In a typewriter key, the combination with a key-lever, of a key-top comprising :i socket adapted to fit on saidkey-lever, a key-paper and key-glass in said socket, and a cap on said socket to hold said key-paper and key-glass in position, and a compression spring in the socket between the key-paper IDU and key-lever for providing resiliently-re sisted movement between seid key-top and key-lever for cushioning the key-stroke, said oep being removable to allow removal of said key-paper, key-glass, and spring from said socket.

4. In a typewriter key, the combination with :L key-lever, of a socket fitting on seid lever, a key-paper and key-glass in the upper end of said socket, a cap on said socket for holding said key-paper and keyglassin position, a housing in said socket, a spring in said housing bearing' against said key-lever and socket, and a lost-motion oonneotion between said socket and lever normally taken up by said spring.

5. In a typewriting machine, the combination with a key-lever having an upstanding end, of e key-top comprising a socket slidably fitting over the upstanding end of the keylever for substantially Vertical movement thereon, said socket having` an enlarged upper encl forming` e keycup, a. key-paper and e key-glass in the keybup, said socket forming a housing below the key-cup, a eonipression spring in the housing between the key-paper and the end of the key-lever, e Cap on the key-cup for receiving the thrust ot' the spring and for retaining the keypaper and the key-glass in the key-cup, and a lost-motion connection between the socket and the end of the key-lever normally taken up by the spring lifting' the key-top on the end of the key-lever so as to cushion the keytop on the key-lever.

ALFRED G. F. KUROVVSKI.

l/Vitnesses:

CATHERINE A. NnWnLL, EDiTH B. LIBBEY. 

